well we know the fraction must be out of 15.
so keep plugging in numbers (1-15) out of 15 to see which equals 0.933...
14/15 = 0.9333... after some strenuous work with a calculator.
this means 14 students said "yes" to summer break should be longer
just in case you didnt follow along: A. 14/15, B. 14 students